EntityImageTransitionLabel.java
/* ========================================================================
* PlantUML : a free UML diagram generator
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* (C) Copyright 2009-2024, Arnaud Roques
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* Original Author: Arnaud Roques
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package net.sourceforge.plantuml.svek.image;
import net.sourceforge.plantuml.abel.Entity;
import net.sourceforge.plantuml.klimt.UTranslate;
import net.sourceforge.plantuml.klimt.creole.Display;
import net.sourceforge.plantuml.klimt.drawing.UGraphic;
import net.sourceforge.plantuml.klimt.font.FontConfiguration;
import net.sourceforge.plantuml.klimt.font.FontParam;
import net.sourceforge.plantuml.klimt.font.StringBounder;
import net.sourceforge.plantuml.klimt.geom.HorizontalAlignment;
import net.sourceforge.plantuml.klimt.geom.XDimension2D;
import net.sourceforge.plantuml.klimt.shape.TextBlock;
import net.sourceforge.plantuml.klimt.shape.URectangle;
import net.sourceforge.plantuml.stereo.Stereotype;
import net.sourceforge.plantuml.svek.AbstractEntityImage;
import net.sourceforge.plantuml.svek.ShapeType;
public class EntityImageTransitionLabel extends AbstractEntityImage {
private final TextBlock textBlock;
private static final double MARGIN = 4;
public EntityImageTransitionLabel(Entity entity) {
super(entity);
final Stereotype stereotype = entity.getStereotype();
// Use same font configuration as arrow labels
final FontConfiguration fontConfiguration = FontConfiguration.create(getSkinParam(), FontParam.ARROW, stereotype);
// Create text block from entity display
final Display display = getEntity().getDisplay();
// Ensure we have a valid display to render
if (display != null && !Display.isNull(display)) {
this.textBlock = display.create(fontConfiguration, HorizontalAlignment.CENTER, getSkinParam());
} else {
// Fallback to entity name if display is not available
this.textBlock = Display.create(getEntity().getName()).create(fontConfiguration, HorizontalAlignment.CENTER, getSkinParam());
}
}
public XDimension2D calculateDimension(StringBounder stringBounder) {
try {
// Return dimensions based on the text content plus margins
XDimension2D textDim = textBlock.calculateDimension(stringBounder);
return textDim.delta(MARGIN * 2, MARGIN * 2);
} catch (Exception e) {
// Fallback to safe default dimensions if calculation fails
return new XDimension2D(20, 20);
}
}
final public void drawU(UGraphic ug) {
final StringBounder stringBounder = ug.getStringBounder();
final XDimension2D dimTotal = calculateDimension(stringBounder);
final XDimension2D dimText = textBlock.calculateDimension(stringBounder);
// Draw a rounded rectangle background for the label
final URectangle rect = URectangle.build(dimTotal.getWidth(), dimTotal.getHeight()).rounded(5);
ug.draw(rect);
// Center the text within the rectangle
final double xText = (dimTotal.getWidth() - dimText.getWidth()) / 2;
final double yText = (dimTotal.getHeight() - dimText.getHeight()) / 2;
textBlock.drawU(ug.apply(new UTranslate(xText, yText)));
}
public ShapeType getShapeType() {
// Use RECTANGLE for a proper node shape
return ShapeType.RECTANGLE;
}
}